Gene/Protein
Disease
Symptom
Drug
Enzyme
Compound
Pivot Concepts:
Gene/Protein
Disease
Symptom
Drug
Enzyme
Compound
Target Concepts:
Gene/Protein
Disease
Symptom
Drug
Enzyme
Compound
Query: KEGG:D00907 (
CET
)
159
document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)
Flavodiiron protein (FLV) mediates photoreduction of O
2
to H
2
O. It is conserved from cyanobacteria to gymnosperms but not in angiosperms. The introduction of a moss (
Physcomitrella patens
)
FLV
(
PpFLV
) gene into Arabidopsis (
Arabidopsis thaliana
) made photosystem I (PSI) resistant to fluctuating light. Here, we used the same strategy with three rice (
Oryza sativa
) genotypes. PpFLV in the wild-type rice background functioned as an efficient PSI electron sink and increased resistance to PSI photodamage under fluctuating light. The introduction of PpFLV into the
PGR5
-RNAi mutant [defective in PROTON GRADIENT REGULATION5 (PGR5)-dependent cyclic electron transport around PSI,
CET
-PSI], the
crr6
mutant [defective in chloroplast
NAD
(P)H-dehydrogenase-like complex (NDH)-dependent
CET
-PSI], and the
PGR5
-RNAi
crr6
double mutant (double defective in
CET
-PSI activity) alleviated PSI photodamage under fluctuating light. Furthermore, PpFLV substituted for the function of PGR5- and NDH-dependent
CET
-PSI without competing for CO
2
assimilation under constant light, as there was no difference in CO
2
assimilation per Rubisco content and biomass production was recovered to the wild-type level. Thus, the exogenous FLV system could act not only as a safety valve under fluctuating light, but also generate a proton motive force for balancing the ATP/NADPH production ratio during steady-state photosynthesis.
...
PMID:Flavodiiron Protein Substitutes for Cyclic Electron Flow without Competing CO
2
Assimilation in Rice. 2924 78
